Overview

Distribution

National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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Physical Description

Morphology

Description

Perennials, to 150 cm (roots fibrous). Leaves bluish green (heavily glaucous), blades lanceolate to elliptic (not lobed), leathery, bases attenuate, margins entire or remotely serrulate, apices acute, faces glabrous; basal petiolate, 20–50 × 4–10 cm; cauline petiolate or sessile, 10–25 × 2–8 cm. Heads borne singly or (2–10) in ± corymbiform arrays. Phyllaries to 1.5 cm. Receptacles conic to columnar; paleae 4–6.5 mm, apices acute, often attenuate, abaxial tips hairy. Ray florets 7–15; laminae elliptic to oblong, 25–40 × 8–14 mm, abaxially hairy. Discs 15–35 × 14–22 mm. Disc florets 250–400+; corollas yellowish green, 3–4 mm; style branches ca. 1 mm, apices acute. Cypselae 4–5.5 mm; pappi coroniform or of ± connate scales, to 1.2 mm. 2n = 36.
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Diagnostic Description

Synonym

Rudbeckia californica A. Gray var. glauca S. F. Blake
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Type Information

Holotype for Rudbeckia californica var. glauca S.F. Blake
Catalog Number: US 1488180
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Preparation: Pressed specimen
Collector(s): S. F. Blake
Year Collected: 1927
Locality: Ca. 20 mi NE of Crescent City, road to Granto Pass., Del Norte, California, United States, North America
  • Holotype: Blake, S. F. 1931. J. Wash. Acad. Sci. 21: 330.
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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: N3 - Vulnerable

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NatureServe Conservation Status

Rounded Global Status Rank: T3 - Vulnerable

Reasons: Rudbeckia californica var. glauca (synonym R. glaucescens) ranges from northern California (60-1250 meters) to southwestern Oregon, occurring along streambanks and in springy places.

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Notes

Comments

Rudbeckia glaucescens often grows on serpentine and often with Darlingtonia.
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Names and Taxonomy

Taxonomy

Comments: Rudbeckia californica, glaucescens, and klamathensis (as treated by Kartesz, 1999) have sometimes (e.g., by Kartesz in 1994) been treated as varieties (with the names californica, glauca, and intermedia, respectively) in a more broadly viewed species R. californica. LEM 20Feb01.

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